On September 5,2022,a M6.8 earthquake struck Luding county,Sichuan province.This paper examines earthquake early warning information generated by two sets of earthquake early warning processing software,EEW and JEEW,deployed within the Sichuan earthquake early warning network.EEW and JEEW issued their initial warning alerts 4.4 seconds and 8.2 seconds after the earthquake,respectively.The magnitude deviations were-1.6 and-0.8,while the epicenter location deviations were 11.2 km and 0.8 km,respectively.Over time and with increased data from additional monitoring stations,the early warning processing results eventu-ally aligned with the findings of the official earthquake catalog.The earthquake early warning information had a blind area radius of 14.7 km.Outside this blind area,regions experiencing intensity level Ⅵ or higher were provided with warning times ranging from 0 to 21 seconds.The effectiveness of disaster mitigation was evident within the operational scope of the early warning system.
关键词
地震预警/泸定地震/预警处理结果/减灾效能
Key words
Earthquake early warning/Luding M6.8 earthquake/Early warning processing results/Disaster reduction effect-iveness
维普
万方数据